Just my initial experiment. The Poser Pro image (left) looks much better, IMO, but I also know my way around PP a lot more than I do either Reality or Lux.

Of course the scenes cannot be fully identical by the nature of the case. The Poser scene has one spotlight to the fore and an illuminated plane off to the left. The Lux scene uses two of Reality's mesh lights, positioned similarly. I played with various Lux settings, including camera Film Response in order to get reasonably close to the same colour range. No postwork, obviously.

Click to view full size.

FWIW.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3